diff --git a/src/views/flow/FlowDiagram.vue b/src/views/flow/FlowDiagram.vue
index 16c4599..7ae9c8f 100644
--- a/src/views/flow/FlowDiagram.vue
+++ b/src/views/flow/FlowDiagram.vue
@@ -1,20 +1,13 @@
 <script setup lang="ts">
 // 流程示意图（方案 §4）：深链页不挂菜单；query: flowGuid|instanceId|defId（三选一）+ mode（dept|user，缺省 user）。
-// 三视图（2026-09-17）：auto=示意图（手写 SVG 自动布局，零图形库）｜canvas=画布视图（bpmn-js 只读渲染，
-// 复用设计器的 contentJson→BPMN 通道，与示意图视觉区分）｜img=进度图（服务端 PNG 流）。
+// 出图形态两档（2026-10-03 画布视图退役）：auto=示意图（后端 positions 单源，手写 SVG）｜img=进度图（服务端 PNG 流）。
 // 显示口径（2026-09-18）：只两档 dept=科室/user=人员，不传=人员；与办件详情/办理页的轨迹口径同参数。
-import { ref, computed, nextTick, onMounted, onUnmounted, watch } from "vue";
+import { ref, computed, onMounted, watch } from "vue";
 import { useRoute, useRouter } from "vue-router";
 import { Message } from "view-ui-plus";
 import { flowApi } from "@/api/module/flow";
 import SourceDrawer from "@/views/flow/components/SourceDrawer.vue";
 import config from "@/assets/config/host.config";
-import NavigatedViewer from "bpmn-js/lib/NavigatedViewer";
-import { toBpmnXml, CanvasJson } from "@/views/flow/admin/def-editor/bpmn/serialize";
-// bpmn-js 渲染样式（设计器 custom.ts 已全局引过，此处再引由打包器去重；漏引连线/图标异常）
-import "diagram-js/assets/diagram-js.css";
-import "bpmn-js/dist/assets/bpmn-js.css";
-import "bpmn-js/dist/assets/bpmn-font/css/bpmn-embedded.css";
 
 const route = useRoute();
 const router = useRouter();
@@ -29,10 +22,9 @@ const sourceText = ref("");
 const sourceTitle = ref("");
 const sourceLoading = ref(false);
 
-/** 出图形态（2026-09-17 三选一）：auto=示意图（自动布局）｜canvas=画布视图（bpmn-js 只读）｜img=进度图（服务端 PNG 流） */
-const chartStyle = ref<string>((route.query.chart as string) || "auto");
+/** 出图形态两档（2026-10-03 砍画布视图）：auto=示意图｜img=进度图；旧深链 chart=canvas 归一到 auto */
+const chartStyle = ref<string>(route.query.chart === "img" ? "img" : "auto");
 const showImg = computed(() => chartStyle.value === "img");
-const showCanvas = computed(() => chartStyle.value === "canvas");
 
 /** 进度图 img 直嵌源（同 InstanceDetail 的"CAS 验证码式"，img 不走 alova 显式带 serviceHost；管理面 defId 走 admin 端点） */
 const pngSrc = computed(() => {
@@ -49,8 +41,18 @@ const DEF_STATUS: Record<number, string> = { 0: "草稿", 1: "已发布", 2: "
 // 布局常量与拓扑分层算法在 src/utils/flowLayout.ts（与设计器画布共用；并行分支组垂直居中）
 import { layout as autoLayout, PAD, Pos } from "@/utils/flowLayout";
 
+/** 布局：后端 positions 单源（内容区坐标）；旧后端未下发时回退本地自动布局（灰度兜底） */
 const positions = computed<Record<string, Pos>>(() => {
-    return autoLayout({ nodes: vo.value?.nodes || [], edges: vo.value?.edges || [] });
+    const raw = (vo.value as any)?.positions as Record<string, { x: number; y: number; w: number; h: number }> | undefined;
+    const nodes: any[] = vo.value?.nodes || [];
+    if (raw && nodes.length && nodes.every((n) => raw[String(n.id)])) {
+        const out: Record<string, Pos> = {};
+        Object.entries(raw).forEach(([id, p]) => {
+            out[id] = { x: p.x, y: p.y, w: p.w, h: p.h, depth: 0, row: 0 };
+        });
+        return out;
+    }
+    return autoLayout({ nodes, edges: vo.value?.edges || [] });
 });
 
 const vbSize = computed(() => {
@@ -178,94 +180,10 @@ async function load() {
     }
 }
 
-// ==================== 画布视图（bpmn-js 只读渲染，2026-09-17 与示意图区分） ====================
-
-const bpmnHost = ref<HTMLDivElement | null>(null);
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-let bpmnViewer: any = null;
-
-/** DiagramVo → 画布视图数据（layout 为后端透传的设计器中心坐标；缺省回退共享自动布局） */
-const bpmnDef = computed<CanvasJson | null>(() => {
-    const nodes: any[] = vo.value?.nodes || [];
-    if (!nodes.length) return null;
-    return {
-        code: "",
-        name: vo.value?.name || "",
-        start: "start",
-        nodes: nodes.map((n) => ({
-            id: String(n.id),
-            type: n.type,
-            name: n.subLabel ? `${n.label}\n${n.subLabel}` : n.label,
-        })),
-        edges: ((vo.value?.edges || []) as any[]).map((e) => ({
-            from: String(e.from), to: String(e.to), name: e.name,
-        })),
-        settings: {},
-        layout: vo.value?.layout as CanvasJson["layout"],
-    };
-});
-
-async function initBpmn() {
-    const host = bpmnHost.value;
-    const def = bpmnDef.value;
-    if (!host || !def) return;
-    bpmnViewer?.destroy();
-    bpmnViewer = new NavigatedViewer({ container: host });
-    try {
-        // eslint-disable-next-line @typescript-eslint/no-explicit-any
-        await (bpmnViewer as any).importXML(toBpmnXml(def));
-    } catch (e: any) {
-        Message.error(`画布视图载入失败：${e?.message || e}`);
-        return;
-    }
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const canvas = bpmnViewer.get("canvas") as any;
-    canvas.zoom("fit-viewport", "auto");
-    // 运行时状态着色（instance 口径）：marker 类 + <style> 里 .fc-* 规则
-    nodesWithState().forEach(([id, state]) => canvas.addMarker(id, `fc-${state}`));
-}
-
-function nodesWithState(): Array<[string, string]> {
-    return ((vo.value?.nodes || []) as any[])
-        .filter((n) => n.state)
-        .map((n) => [String(n.id), String(n.state)]);
-}
-
-watch([showCanvas, bpmnDef], ([on]) => {
-    if (on) void nextTick(initBpmn);
-});
-
-onUnmounted(() => {
-    bpmnViewer?.destroy();
-    bpmnViewer = null;
-});
-
-function bpmnZoom(delta: number) {
-    if (!bpmnViewer) return;
-    const c = bpmnViewer.get("canvas");
-    c.zoom(c.zoom() + delta);
-}
-
-function bpmnFit() {
-    bpmnViewer?.get("canvas").zoom("fit-viewport", "auto");
-}
-
 // ==================== 导出 PNG（方案 §4.4） ====================
 
-/** 当前形态的 SVG 源：示意图取 DOM，画布视图取 bpmn saveSVG（补 width/height 供 Image 取自然尺寸） */
+/** 当前形态的 SVG 源：示意图取 DOM */
 async function currentSvg(): Promise<string | null> {
-    if (chartStyle.value === "canvas") {
-        if (!bpmnViewer) return null;
-        const { svg } = await bpmnViewer.saveSVG();
-        if (!/width="/.test(svg)) {
-            const m = svg.match(/viewBox="([\d.\s-]+)"/);
-            if (m) {
-                const parts = m[1].trim().split(/\s+/);
-                return svg.replace(/<svg /, `<svg width="${parts[2]}" height="${parts[3]}" `);
-            }
-        }
-        return svg;
-    }
     if (!svgRef.value) return null;
     return new XMLSerializer().serializeToString(svgRef.value);
 }
@@ -330,7 +248,6 @@ watch(() => route.query, () => load());
                 {{ DEF_STATUS[vo.status] || vo.status }}</Tag>
             <RadioGroup :model-value="chartStyle" size="small" type="button" @on-change="switchChartStyle">
                 <Radio label="auto">示意图</Radio>
-                <Radio label="canvas">画布视图</Radio>
                 <Radio label="img">进度图</Radio>
             </RadioGroup>
             <RadioGroup v-if="!showImg" :model-value="viewMode" size="small" @on-change="switchMode">
@@ -346,15 +263,6 @@ watch(() => route.query, () => load());
         <div class="canvas img-box" v-if="vo && showImg">
             <img :src="pngSrc" alt="流程示意图" />
         </div>
-        <!-- 画布视图：bpmn-js 只读渲染（bpmn.io 水印为协议要求，勿删） -->
-        <div class="canvas bpmn-box" v-else-if="vo && showCanvas">
-            <div ref="bpmnHost" class="bpmn-host"></div>
-            <div class="bpmn-ops">
-                <Button size="small" @click="bpmnZoom(-0.1)">−</Button>
-                <Button size="small" @click="bpmnFit">复位</Button>
-                <Button size="small" @click="bpmnZoom(0.1)">＋</Button>
-            </div>
-        </div>
         <!-- 示意图：手写 SVG 自动布局 -->
         <div class="canvas" v-else-if="vo">
             <svg :width="vbSize.w" :height="vbSize.h" :viewBox="`0 0 ${vbSize.w} ${vbSize.h}`"
@@ -473,17 +381,4 @@ watch(() => route.query, () => load());
     0%, 100% { filter: none; }
     50% { filter: drop-shadow(0 0 6px rgba(237, 64, 20, 0.8)); }
 }
-
-/* 画布视图 */
-.bpmn-box { position: relative; }
-.bpmn-host { height: 560px; }
-.bpmn-ops { position: absolute; top: 10px; right: 12px; display: flex; gap: 6px; z-index: 5; }
-/* bpmn.io 水印按协议保留 */
-.bpmn-box :deep(.bjs-powered-by) { display: block; }
-/* 运行时状态着色（instance 口径 marker：done/active/rejected/pending） */
-.bpmn-box :deep(.fc-done > .djs-visual > :nth-child(1)) { stroke: #19be6b !important; }
-.bpmn-box :deep(.fc-active > .djs-visual > :nth-child(1)) { stroke: #ed4014 !important; stroke-width: 2.5px !important; }
-.bpmn-box :deep(.fc-rejected > .djs-visual > :nth-child(1)) { stroke: #ed4014 !important; fill: #fff1f0 !important; }
-.bpmn-box :deep(.fc-pending > .djs-visual > :nth-child(1)) { stroke: #b7bcc4 !important; }
-.bpmn-box :deep(.fc-done > .djs-visual > .djs-label) { fill: #4f5b66; }
 </style>